EP0435278A3 - Bias magnetic field generating apparatus - Google Patents
Bias magnetic field generating apparatus Download PDFInfo
- Publication number
- EP0435278A3 EP0435278A3 EP19900125553 EP90125553A EP0435278A3 EP 0435278 A3 EP0435278 A3 EP 0435278A3 EP 19900125553 EP19900125553 EP 19900125553 EP 90125553 A EP90125553 A EP 90125553A EP 0435278 A3 EP0435278 A3 EP 0435278A3
- Authority
- EP
- European Patent Office
- Prior art keywords
- magnetic field
- generating apparatus
- field generating
- bias magnetic
- bias
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B13/00—Recording simultaneously or selectively by methods covered by different main groups among G11B3/00, G11B5/00, G11B7/00 and G11B9/00; Record carriers therefor not otherwise provided for; Reproducing therefrom not otherwise provided for
- G11B13/04—Recording simultaneously or selectively by methods covered by different main groups among G11B3/00, G11B5/00, G11B7/00 and G11B9/00; Record carriers therefor not otherwise provided for; Reproducing therefrom not otherwise provided for magnetically or by magnetisation and optically or by radiation, for changing or sensing optical properties
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/1055—Disposition or mounting of transducers relative to record carriers
- G11B11/10556—Disposition or mounting of transducers relative to record carriers with provision for moving or switching or masking the transducers in or out of their operative position
- G11B11/1056—Switching or mechanically reversing the magnetic field generator
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP89342677A JPH03203002A (en) | 1989-12-28 | 1989-12-28 | Bias matnetic field inverter |
JP342677/89 | 1989-12-29 | ||
JP332356/90 | 1990-11-28 | ||
JP33235690 | 1990-11-28 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0435278A2 EP0435278A2 (en) | 1991-07-03 |
EP0435278A3 true EP0435278A3 (en) | 1992-09-02 |
EP0435278B1 EP0435278B1 (en) | 1996-07-10 |
Family
ID=26574170
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90125553A Expired - Lifetime EP0435278B1 (en) | 1989-12-28 | 1990-12-27 | Bias magnetic field generating apparatus |
Country Status (5)
Country | Link |
---|---|
US (1) | US5229983A (en) |
EP (1) | EP0435278B1 (en) |
KR (1) | KR940001453B1 (en) |
CA (1) | CA2033275C (en) |
DE (1) | DE69027754T2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5570329A (en) * | 1995-03-31 | 1996-10-29 | Eastman Kodak Company | System for selectively inverting a magnetic bias field for magneto-optic recording |
US6570724B1 (en) * | 1999-04-26 | 2003-05-27 | Fuji Photo Film Co., Ltd. | Method and apparatus for magnetic transfer |
JP4046480B2 (en) * | 2001-02-23 | 2008-02-13 | 富士フイルム株式会社 | Magnetic transfer method and magnetic transfer apparatus |
WO2018182203A1 (en) * | 2017-03-30 | 2018-10-04 | 엘지이노텍 주식회사 | Lens driving device and camera module |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0222916A1 (en) * | 1985-04-29 | 1987-05-27 | Sony Corporation | External magnetic field reversing apparatus for photomagnetic disks |
US4701895A (en) * | 1986-03-28 | 1987-10-20 | Rca Corporation | Magnetic biasing apparatus for magneto-optic recording including a permanent magnet |
EP0290281A2 (en) * | 1987-05-08 | 1988-11-09 | Sharp Kabushiki Kaisha | Apparatus for giving auxiliary magnetic field |
US4962492A (en) * | 1988-04-29 | 1990-10-09 | Laser Magnetic Storage International Company | Magneto-optic data recording system, actuating device therefor and method of providing same |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5724047A (en) * | 1980-07-21 | 1982-02-08 | Matsushita Electric Ind Co Ltd | Recorder and reproducer |
GB2083677B (en) * | 1980-07-16 | 1985-01-23 | Matsushita Electric Ind Co Ltd | Magnetooptical recording medium and a magnetooptical recording-and reeproducing device |
JPH0636241B2 (en) * | 1982-09-21 | 1994-05-11 | シャープ株式会社 | Thermomagnetic recording device |
JPS5992406A (en) * | 1982-11-17 | 1984-05-28 | Matsushita Electric Ind Co Ltd | Photo-magnetic recorder |
JPS59146408A (en) * | 1983-02-09 | 1984-08-22 | Matsushita Electric Ind Co Ltd | Impressing device of record erasing magnetic field for photomagnetic recording medium |
JPS60226044A (en) * | 1984-04-24 | 1985-11-11 | Sony Corp | Optomagnetic recording device |
JPH07105085B2 (en) * | 1986-07-30 | 1995-11-13 | 株式会社日立製作所 | Magneto-optical disk device |
JPH0727606B2 (en) * | 1986-12-11 | 1995-03-29 | ソニー株式会社 | Magnetic field application device for recordable optical disk |
JPH0633526Y2 (en) * | 1988-11-10 | 1994-08-31 | ティアツク株式会社 | Magneto-optical disk device |
JPH0636481Y2 (en) * | 1989-02-13 | 1994-09-21 | ティアツク株式会社 | Bias magnetic field applying device for magneto-optical disk device |
-
1990
- 1990-12-27 EP EP90125553A patent/EP0435278B1/en not_active Expired - Lifetime
- 1990-12-27 US US07/634,765 patent/US5229983A/en not_active Expired - Fee Related
- 1990-12-27 CA CA002033275A patent/CA2033275C/en not_active Expired - Fee Related
- 1990-12-27 DE DE69027754T patent/DE69027754T2/en not_active Expired - Fee Related
- 1990-12-28 KR KR1019900022180A patent/KR940001453B1/en not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0222916A1 (en) * | 1985-04-29 | 1987-05-27 | Sony Corporation | External magnetic field reversing apparatus for photomagnetic disks |
US4701895A (en) * | 1986-03-28 | 1987-10-20 | Rca Corporation | Magnetic biasing apparatus for magneto-optic recording including a permanent magnet |
EP0290281A2 (en) * | 1987-05-08 | 1988-11-09 | Sharp Kabushiki Kaisha | Apparatus for giving auxiliary magnetic field |
US4962492A (en) * | 1988-04-29 | 1990-10-09 | Laser Magnetic Storage International Company | Magneto-optic data recording system, actuating device therefor and method of providing same |
Also Published As
Publication number | Publication date |
---|---|
CA2033275C (en) | 1994-10-25 |
DE69027754D1 (en) | 1996-08-14 |
US5229983A (en) | 1993-07-20 |
EP0435278A2 (en) | 1991-07-03 |
CA2033275A1 (en) | 1991-06-29 |
KR910013117A (en) | 1991-07-31 |
KR940001453B1 (en) | 1994-02-23 |
EP0435278B1 (en) | 1996-07-10 |
DE69027754T2 (en) | 1996-12-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5229723B1 (en) | Magnetic field generating device for mri | |
EP0262880A3 (en) | Magnetic field generating device for nmr-ct | |
GB2155642B (en) | Apparatus for generating highly homogeneous magnetic field | |
GB8819778D0 (en) | Magnetic resonance methods & apparatus | |
SG43224A1 (en) | Magnetic field generating device used for MRI | |
DE3566185D1 (en) | Magnetic field generating device for nmr-ct | |
GB8825529D0 (en) | Magnetic field generating assembly | |
GB8701363D0 (en) | Magnetic field generating assembly | |
GB2245416B (en) | A magnetic field generating apparatus and a plasma generating apparatus for use therewith | |
GB9022145D0 (en) | Magnetic field generating assembly | |
GB8912601D0 (en) | Magnetic field generating apparatus | |
GB8820216D0 (en) | Coil for generating homogeneous magnetic field | |
GB9009577D0 (en) | Magnetic field generating assembly | |
AU2632888A (en) | Magnetic field generating therapeutical apparatus | |
GB9002863D0 (en) | Magnetic field generating assembly | |
GB2229822B (en) | Surveying apparatus | |
GB2207762B (en) | Magnetic field compensating apparatus | |
GB9009579D0 (en) | Magnetic field generating assembly | |
GB2235812B (en) | Magnetic reproduction apparatus | |
EP0435278A3 (en) | Bias magnetic field generating apparatus | |
EP0459726A3 (en) | Magnetic disk apparatus | |
GB2246902B (en) | Magnetic head apparatus | |
GB2237919B (en) | Magnetic reproducing apparatus | |
GB2226138B (en) | Magnetic resonance apparatus | |
EP0278756A3 (en) | Magnetic field generators |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19901227 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): DE FR GB |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): DE FR GB |
|
17Q | First examination report despatched |
Effective date: 19940706 |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE FR GB |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
REF | Corresponds to: |
Ref document number: 69027754 Country of ref document: DE Date of ref document: 19960814 |
|
ET | Fr: translation filed | ||
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20001212 Year of fee payment: 11 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20001218 Year of fee payment: 11 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20001227 Year of fee payment: 11 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20011227 |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20020702 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20011227 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20020830 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |